T-Maxx Help

[jackedman]

This is the problem I'm having. I get the truck started and when i give it full thottle it bogs out and even when i slowly give it gas once it hit second gear it bogs out too. I have the trx 2.5 and yes i have had it back to factory settings. any ideas????

[looker2756]

How old is the glow plug ? Still sounds like the carb. needs a little tuning. Sounds like the High speed needle is a bit rich ? This is a hard one to diagnose with out seeing exactally how it acts. Rich & lean can act similar. Does it smoke alot out of the pipe ?

[jackedman]

The plug isn't that old maybe an month or so. there is smoke but not really alot. But it also gets hot quick too so im lost for the problem so anything would help

[looker2756]

Sounds like an air leak somewhere to me. This will make them run lean & get hot very fast. Might be just to lean ... ?

[Daveo]

If it landed on the head, check to make sure the head is still on tight. That will definatly cause this issue

[jackedman]

I made sure the head and all the bolts were tight after it started happening

[JGtruggy]

check your gas lines for cracks and check your gaskett on the header.

[jackedman]

I didn't think of the fuel lines I think i should put new ones on anyways. Also I i'm not using the stock pipe and header I have the ths pipe and header now should i replace the header spring?? but it's also an new pipe setup

[JGtruggy]

I didn't think of the fuel lines I think i should put new ones on anyways. Also I i'm not using the stock pipe and header I have the ths pipe and header now should i replace the header spring?? but it's also an new pipe setup
If the spring is loose at all replace. Is there any sign of gas residue on the engine by the header gasket? If so, you may need a new gaskett.

[jackedman]

I'll take an look to see if there is any gas residue , But i think i'll replace the spring anyways

[pottsgroverc]

Need more description to help fully, but sounds like you are lean. Your glow plug can be bad even though a month old. Glow plugs last from hours to months...many variables. If tuning doesn't solve the problem, check the needles in the carb to make sure none are broke or stripped. If that isn't it, tear the engine down and check all components.

[jackedman]

thanks man It's snowing where i am so i think i will go out and play tomorrow moring an see then

[jackedman]

Ok guys I tried to start the maxx today and it was an pain in the butt to start it didnt want to stay started at all and when it did start it was only for and few seconds at most. I riched it and leaned it out and nothing and even increased the idle too and nothing. Now would this mean the engine is finished or what should i do now????

[pottsgroverc]

Go back to factory settings, make sure your glow plug is good and make sure you are getting fuel. If it won't start up and you are unable to strip and engine and tell if it is good or not. Take it to a LHS or a friend who will know.

[jackedman]

I did go back to factory settings and it didn't work. Now I repalced the carb housing and it seems to be running a bit better but not great. Now Does anyone else have anyother ideas other than tuning what the problem could be it just seems thats tha answer for everything when these trucks don't work the way the should. Also I have striped the motor down and i did see really anything wrong except that the piston was brown ish color does this mean anything??

[pottsgroverc]

Your piston, does it look like burn marks. How does your sleeve look? Does the head look like it has taken impact from the piston? Does the piston look like it has impacted the head? Since you put the new carb unit on, it is running better, but I am assuming it still won't tune right??? Make sure no air is getting in around the carb housing, this will make your tune vary.

[jackedman]

It doesn't look like there are any impacts to the head or piston and there is no burn marks on the piston but it's an darker brown color. With the new card body on it does run a bit better but it overheats still. Now i know what your ging to say and it's the turning i have it almost 4.5 turns out so its rich really rich i had ti increase the idle just to keep it running and it lkilled an plug on me in just under an 1/4 tank should i try an LC3 plug to see if it will burn the fuel better?
Again thanks for all your help guys

[looker2756]

By what you just said you are messing with the high speed needle. If it does not want to idle correctly, this would be on the low speed needle. The high speed only comes into play at around 1/2 throttle on up. I would check the low speed adjustment. If it seems rich at idle. Lean out the low speed just a small ammount & see how it acts. If you have bumped up the idle already, as you get leaner it will start reving a bit more. The low speed will affect idle & low speed performance. I'll keep watching the thread & see how it goes for you. Hope you get it going ! Always a bummer to have a truck that don't run right.

[jackedman]

OK I'll try it out on sunday I can't tomorrow I'm going to Monster Jam and seeing some real monster truck it's going to be great but i will let you know how it go's with the turning

[pottsgroverc]

Could be your plug. If you are at factory settings, you should be able to run. Not sure of your location, but remember lower temperature requires a richer setting in your high speed needle. When you adjust high speed, you will have to adjust low speed needle to get a better tune. And then, last, you should adjust your idle. Tuning is very hard to do from miles away. Let me know how it works out and if you can provide any more "behavior" issues with the motor it would help. Good luck.

[jackedman]

Ok right now It's way to cold to do anything and plus it just snowed again. Now pottsgroverc you asked what else it's doing well it does get hot faster then what it should and it's hard to hit full thottle and second gear too. So really i have no idea whats wrong with it I have never had this problem before but i am going to buy and lc3 plug and try that out.

[pottsgroverc]

Ok right now It's way to cold to do anything and plus it just snowed again. Now pottsgroverc you asked what else it's doing well it does get hot faster then what it should and it's hard to hit full thottle and second gear too. So really i have no idea whats wrong with it I have never had this problem before but i am going to buy and lc3 plug and try that out.
Can't get second gear.

1.) Second gear is not adjusted right to kick in, 2.) Motor is not turning enough RPMs to get to second gear, 3.) Clutch is not engaging right to pull into 2nd gear.

Overheating

1.) Running too lean, 2.) Running on full throttle and no second gear. 3.) Obstructed airflow 4.) Clutch is not engaging and letting motor run at higher RPMS with less resistance. 5.) Running fuel mixture with not enough oil content.

Can't hit full throttle (depends on what you consider full throttle)

If it is not opening the whole way, then it is a servo, transmitter trim setting, or bad needle.
If it does not "sound" like it should, you may be at full throttle but one of the other problems is not letting you get there.

Also, make sure your slipper is adjusted correctly. Make sure you use air filter oil on your filters, not a substitute oil.

Let me know if you haven't investigated any of these yet.

[Benz]

Hey my name is Benz and I know how you feel, but that aside does it work now??

[jackedman]

pottsgroverc i'll let you know when i run this test
Benz what was you problem and what did you do to fix it

[Benz]

my one way bearing is no good because it lost some needles.